Draw a graph that depicts the loss of hydraulic conductivity of xylem as a function of xylem tension. The graph should show this relationship for two kinds of plants:
one that is highly vulnerable to cavitation and loses 50% of its hydraulic conductivity at -2MPa, and
one that is highly resistant to cavitation and loses 50% of its hydraulic conductivity at -8MPa.
Which of these might be a cottonwood and which a juniper? Why?